Shemot 15:21-23

Orthodox Jewish Bible

²¹ And Miryam sang to them, Sing ye to Hashem, for He hath triumphed gloriously; the sus and its rider hath He thrown into the yam.

²² So Moshe brought Yisroel from the Yam Suf, and they went out into the midbar of Shur; and they went shloshet yamim in the midbar, and found no mayim.

²³ And when they came to Marah (Bitter Place), they could not drink of the mayim from Marah, for they were marim; therefore the shem of it was called Marah.